Weft beat-up mechanism of looms for weaving



Aug 14, 1945 D. w. sHlMwELL N 2,382,511.

WEFT BEAT-UP MECHANISM fpF'uLooMs FOR wEAvING Filed Feb.. 16, 1944 4 sheets-shea 4 IIb v ezvboz Patented Aug. 14, 1945 WEFT BEAT-UP MECHANISM or L'ooMs Fon WEAVING Derrick Walter Shimwell, Alderley Edge, England Application February 16,1944, Serial No. 522,609

In Great Britain February 26, 1943 Claims.

This invention relates to weft beat-up mechanism of looms for weaving and has for its object to provide improved beat-up mechanism which allows of the speeding up of the loom cycle without increasing the speed of the shuttle through' the shed and Without the necessity of altering the shuttle race or track. The invention relates particularly to looms of the type'in which beat-up is effected by a comb like part separate from the reed, the latter taking no part in the beat-up operation,

In accordance with my present invention, the beating-up comb enters the warp threads adjacent to the reed from above, travels to the beatup point and then withdraws with an upward movement from the warp threads and returns to its entry point in order to perform the next beat-up operation.

My invention furthercomprises the arrangement in which the beat-up comb withdraws from the beat-up position with a combined backward and upward movement.

The comb teeth may enter the shed immediately in front of the dents of the reed or in the case where the reed dents are staggered, immediately adjacent to the back row of dents so that they come behind any loose end or ends which may gather in front of the reed. The comb may enter the shed when it is closed or may overtake the upper row of warp threads as they movedownwards to the closed position so prolonging the portion of the loom cycle during which th'e shuttle can be vin the shed. The comb may be traversed back and forth by members sliding on rods at opposite sides of the warp threads, and be given a pivotal movement to bring it into the warps and to withdraw it therefrom after beating-up.

The loom sh'uttle may be of the free or fly type, in which no control is exercised over its movements between shuttle boxes or be of the controlled or captive type, as used in narrow fabric and needle looms.

Referring to the accompanying explanatory drawings- Figures 1 and 2 show two dierent positions of one form of weft beat-up mechanism constructed and arranged in accordance with this invention.

Figure 3 is a view similar to .Figure 1 but showing a modified arrangement of beat-up mechanism.

Figure 4 is a detail sectional view on the line A-B of Figure 3.

Figure 5 is a plan view of Figure 1.

In Figures 1 and 2, a indicates the slay sole upon which the shuttle b rides as it passes 'through the warp shed. The upper and lower rows of warp threads c vand d constitute the shed. e indicatesthe reed which is carried by the slay sole. Both reed and slay sole are stationary and take no part in the beat-up operation.

Beat-up is effected by a comb f, the teeth of which have the same spacing as the dents of the reed e. v

The comb f is detach'ably secured by studs as g upon arms h (one at each side of the loom) secured'upon a spindle z', to which also are secured arms as 7', so that the arms h and :i turn together about the axis of the spindle i. The latter -is journalled in bearings in slides as k, one at each end of the spindle i, the slides being capable of movement along guide bars as m, each carried-in a bracket n secured to the slay sole and in a bracket o 'of the side frame of the machine,

Each slide lc is reciprocated along its guide bar m by a link p pivotally connected to the spindle i and to an arm q fulcrumed at rin the side frame of the loom, the `arm q being oscillated by the crank pin s and link t. The crank shaft is indicated ats1. Upon a projecting part u of th'e link t is pivoted one' end of a link 1J which is connected to one arm w of a bell crank lever pivoted to the arm q, the otherarm :r of such lever being connected by the link y to the arm 7' before referred to.

Figure 1 shows the comb f as it is about to enter the closed shed. It will be seen that its end is close to the reed so that the teeth of the com-b can enter the spaces between the warp threads produced by the reed dents. The comb then travels with its end in the path indicated by the track 4. When the comb gets to the beatup position as shown in Figure 2, the shed lhas opened and the shuttle can commence its return flight through the shed. As the comb completes its forward movement, the crank arm s2 comes into line with the link t and there is very little movement of the slide 1c for a considerable anguiar movement ofthe crank arm s2, but during such angular movement, the projecting part u of the link t is imparting a relatively considerable angular movement to the bell crank lever w, :c and the arm 9' with the result that the comb is turned in an anti-clockwise direction about the spindle i and so has an upward movement which draws it clear of the upper row of warp threads whilst the comb travels backwards to a position adjacent the reed when a reverse action takes place and the comb is lowered into the shed.

It will be seen that the fact that the beat-up comb is positioned for movement into the warp threads from above avoids any special form of slay sole a and the need for holding the shuttle against the reed in its night due to the necessity for cutting down the vdimensions lof -the.,slay sole and for gapping' it to enable the teeth of .the comb to come right up to the dents of the reed in order to enable the teeth to enter correctly between the In addition,.thef comb teeth -.can commence to enter the warp shed before the Warp threads.

shuttle has completely left the shed whichis not the case when the comb teethenter'theshe'difrom below in which case the shuttlexmustbefclearcof the warp space before the shuttle can enter.

In the modication shown in Figure^3^thesiides k are reciprocated on the bars m (oneratceach side of the loom) by two links or connecting rods v15am-chconnected to aL crar'xlcpin 6 onfacrankarm `f1=secured to a crank shaftia, "'Each connecting rod 'Si'has :a 4'fulcrum pin 9 -secured ftherein `excentri- 'cally'fwith 'rlationto the "crank pin J6 and'L upon -suh-'pin Sis journalleditheeen'd y'o'f `the ro'd vIll whichiis'coupled' tothe-arm 9. With'iiliisarrairxge- -ment as'withl that in Figures 1'and`2,f`thefarm i is given a considerable angular movement at the fends"offthetraverses of the y-sl-ideilc Vinni-der to fraise the beat-up comb iout -of the 'warp 'f-shed when beat-up is completed and to reintrdduocit adjacent f to A.the 'ree'd 'e. The path of 'the lpoint of 'fthe comb is indicated 'I'by fthe 'trak Il as Yin `Figures-1 and.' 2.

"-Witlr my improvement, vthe'portiono'f the loom iupwardzmovementz'from .ithelwarp threads'and 50 returns to its entry point in order to effect the next beat-up operation.

2. Weft beat-up mechanism as claimed in claim l in which the beat-up comb has both a reciprocatory and a pivotal movement, the pivotal movement giving upward and downward movements to the comb at about the ends of lts traverses.

`3. Weftbeat-,up mechanism as claimed in claim 1 for a loom having a reed which does not effect beat-up, wherein said comb is secured upon arms -upon aspindle-journalled in reciprocatory slides above the warp shed, the slides being reciprocated each froma crank pin, and the spindle being KJ 'turned-about-itsaxis when the slides are at and aboutzthefendsofrtheir traverses by means connected to fulcrum points upon the links (which v'elieotti'ie'reciprocation of the slides) offset with relationfto the connection of said links to the crank pins which impart the back and forth 1.4. Wft beat-up mechanism as claimed in claim 11,comprisin'gisli'desJ bars"disposed above the warp '-'shed "(one atfeach-side vo'f the loom) upon which itl-1e =sliiiesfreciprocate, aspindle jourrxalled` at its 1 enl'ls? in =said Y'brackets 1 secured upon said spindle, rabeatup lcombcarriedf'by -said brackets, con- :necting rods connectedv izo-said spindle at oneend andfto'crak pins at the other end, arms, upon .thefends'of ysaidlspinileffurther connecting rods each connected to one of said arms at one'endand 7to afcrankpinfatthe other-end which isfsecured `in one o'frthe first'mentionedponnecting rods adljacent tothefconnectionoffthe latterito its crank 5 pin.

l25.1Weftbeateup mechanism for a loom ofthe vtypezfin which-the ree'd vdoes 'not'effect'beat-'un comprising a beat-up com-b arranged above the warp ,threa'dsf'and means' to impart a compound A,40 :movement to'fsaid 'comb having one component esubstantiailyfparallel to the weft'threadsland the other component substantially 'perpendicular thereto lwhereby '-said vcomb enters the `warp vthreads adjacent to thereed 'from above, travels ,.45 tothe beateup point and'ell'ectsbeateupfand'then rwitlidrawsxwith'fan upward movement from the warp 'threads 'an'd returns to its entry'point in `order' toreffect thefnext beatup' operation.

ZDERRICK WALTER TSHIMWELL. 

